/*
 *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "common_video/h265/h265_common.h"
#include "common_video/h264/h264_common.h"


namespace webrtc {
    namespace H265 {

        const uint8_t kNaluTypeMask = 0x7E;

        std::vector<NaluIndex> FindNaluIndices(const uint8_t* buffer,
            size_t buffer_size) {
            std::vector<H264::NaluIndex> indices = H264::FindNaluIndices(buffer, buffer_size);
            std::vector<NaluIndex> results;
            for (auto& index : indices) {
                results.push_back({ index.start_offset, index.payload_start_offset, index.payload_size });
            }
            return results;
        }

        NaluType ParseNaluType(uint8_t data) {
            return static_cast<NaluType>((data & kNaluTypeMask) >> 1);
        }

        std::vector<uint8_t> ParseRbsp(const uint8_t* data, size_t length) {
            return H264::ParseRbsp(data, length);
        }

        void WriteRbsp(const uint8_t* bytes, size_t length, rtc::Buffer* destination) {
            H264::WriteRbsp(bytes, length, destination);
        }

        uint32_t Log2(uint32_t value) {
            uint32_t result = 0;
            // If value is not a power of two an additional bit is required
            // to account for the ceil() of log2() below.
            if ((value & (value - 1)) != 0) {
                ++result;
            }
            while (value > 0) {
                value >>= 1;
                ++result;
            }

            return result;
        }

    }  // namespace H265
}  // namespace webrtc